Default Recovery menu on HS-7DTB6-8GBR Help

I need factory reset to my tablet

CPU: A13 -1.2 GHz
Display: 7" 800x400 capacitive touch
OS: Android 4.0 (4.0.4 in the About tablet section of Settings)
Baseband version: HS-GP707_20121208
Kernel version: 3.0.8 (FRi Dec 7, 2012)
Battery: 300mAh, 3.7V

is stuck on AURORA logo

i can put on recovery mode with android logo triangule, but no menu.

don't work Vol+ + power, Vol- + Power, Vol+- + Power, Home+Power+Vol+, Power Home Vol-, only work Home + Power is recovery mode, i can't reset via adb shell because is say - exec '/system/bin/sh' failed: No such file or directory (2)

please if you can help me tell me